土木与环境工程学报（中英文）2024，Vol.46Issue(3)：152-160,9.DOI:10.11835/j.issn.2096-6717.2022.004
基于小波包分析的输电塔螺栓松动损伤识别方法
Damage identification of bolt looseness in transmission tower based on wavelet packet analysis
摘要
Abstract
The structure health monitoring of high voltage transmission tower was very important to ensure the safe operation of the transmission line.When the transmission tower structure was damaged,the gusset plate bolts would be loosened first.The multiscale model of the transmission tower structure is established by using ABAQUS finite element analysis software.The energy change rate of the wavelet packet was taken as the damage index.The damage identification was carried out under different working conditions when bolt looseness of a joint plate at the tower leg.The signal transmission equipment was a sensor based on Internet of Things technology.The data acquisition equipment was PVDF piezoelectric film strain gauge.Applying excitation loads at the bottom of the actual transmission tower structure,the dynamic strain of the measured points on the gusset plate was extracted to verify the damage identification method.The test results show that the damage index can accurately identify the damage degree of the gusset plate.It is also sensitive to bolt looseness near the measuring point.关键词
输电塔/小波包/多尺度分析/压电薄膜/损伤识别Key words
transmission tower/wavelet packet/multiscale analysis/piezoelectric film/damage identification分类
建筑与水利引用本文复制引用
桑硕,余希洋,李小华..基于小波包分析的输电塔螺栓松动损伤识别方法[J].土木与环境工程学报（中英文）,2024,46(3):152-160,9.基金项目
重庆市自然科学基金(cstc2019jcyj-msxmX0254) Natural Science Foundation of Chongqing(No.cstc2019jcyj-msxmX0254) （cstc2019jcyj-msxmX0254）
